body{ background:#ccc}
.box2{ border:1px solid blue; width:100px; height:100px; float:left; margin:0 10px;}
.box3{ border:2px solid red; transform:rotate(45deg); width:100px; height:100px; float:left; margin:0 10px;}
.pic{ width:300px; height:200px; background:url(../image/jd.jpg) no-repeat; border:1px solid red;}
